TY - JOUR
T1 - Chirality-Induced Spin Selectivity in Two-Dimensional Self-Assembled Molecular Networks
AU - Rana, Shammi
AU - Remigio, Massimiliano
AU - Aravindan Geetha, Lekshmi
AU - Strutyński, Karol
AU - Volpi, Martina
AU - John, Sanjay
AU - Baczewski, Lech Tomasz
AU - Paltiel, Yossi
AU - Resel, Roland
AU - Melle-Franco, Manuel
AU - Mali, Kunal S.
AU - Geerts, Yves H.
AU - De Feyter, Steven
N1 - Publisher Copyright:
© 2025 The Authors. Published by American Chemical Society
PY - 2025/11/19
Y1 - 2025/11/19
N2 - Chirality-induced spin selectivity (CISS) has been observed in a wide range of helical systems. Here, we report spin-selective electron transport through two-dimensional (2D) self-assembled molecular networks (SAMNs) formed by an enantiopure organic semiconductor with chiral alkyl side chains [dinaphtho[2,3-b:2‘,3′-f]thieno[3,2-b]thiophene (DNTT)] adsorbed on a magnetic substrate with perpendicular anisotropy. Scanning tunneling microscopy and scanning tunneling spectroscopy (STM and STS) were used to directly visualize the molecular arrangement on ferromagnetic surfaces and to measure the spin-dependent electron transport at the solution/solid interface, respectively. A comparison of enantiomorphous SAMNs under identical experimental conditions revealed an enantiospecific magnetic conductance asymmetry (EMA) exceeding 40% at room temperature. These asymmetries were observed when either the molecular enantiomer was changed or the magnetization direction was switched. Our results indicate that the CISS effect is also operative in nonhelical, one-atom-thick systems where the chirality is expressed in 2D, unlocking exciting opportunities for both fundamental research and practical applications.
AB - Chirality-induced spin selectivity (CISS) has been observed in a wide range of helical systems. Here, we report spin-selective electron transport through two-dimensional (2D) self-assembled molecular networks (SAMNs) formed by an enantiopure organic semiconductor with chiral alkyl side chains [dinaphtho[2,3-b:2‘,3′-f]thieno[3,2-b]thiophene (DNTT)] adsorbed on a magnetic substrate with perpendicular anisotropy. Scanning tunneling microscopy and scanning tunneling spectroscopy (STM and STS) were used to directly visualize the molecular arrangement on ferromagnetic surfaces and to measure the spin-dependent electron transport at the solution/solid interface, respectively. A comparison of enantiomorphous SAMNs under identical experimental conditions revealed an enantiospecific magnetic conductance asymmetry (EMA) exceeding 40% at room temperature. These asymmetries were observed when either the molecular enantiomer was changed or the magnetization direction was switched. Our results indicate that the CISS effect is also operative in nonhelical, one-atom-thick systems where the chirality is expressed in 2D, unlocking exciting opportunities for both fundamental research and practical applications.
UR - https://www.scopus.com/pages/publications/105022148480
U2 - 10.1021/jacs.5c12143
DO - 10.1021/jacs.5c12143
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C2 - 41188189
AN - SCOPUS:105022148480
SN - 0002-7863
VL - 147
SP - 42426
EP - 42432
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 46
ER -